Such a jauntwould take 92 years, by which time you would probably look even older than the admittedly well-preserved Harrison Ford, even allowing for the youth-preserving effects of going really fast.
Deceleration performance is absolutely terrible, although you probably wouldn't want grabby brakes when traveling 17,000+ miles per second: Add another 38 years if your astronaut descendents want to stop to admire the view.
Full disclosure: some scientists are still quite skeptical.

Maynard (Bob "Gilligan's Island" Denver) slyly flashes a nipple to the CBS eye while trying to talk his best buddy Dobie Gillis (Dwayne Hick­man) into taking off all his clothes. Whoever said 1950s television was a vast waste­land obviously didn't know where to look.